Incandescent hydrocarbon-burner.



No. 649,637. Patented May l5,l900. C. K. HAHDING.

INCANDESCENT HYDROCARBUN BURNER.

(Application led Hay 24, 1899.)

. l l l l E x i l ai un n ,g .lll Isl E l' WQIL/wf: mllllml @ai intentCHARLESKNOX I'IARDING, OF CHICAGO, ILLINOS.

ineANeEseENT HYDRoCARBoN-BURNER.

SPECIFICATION forming part of Letters Patent No. 649,637, dated May 15,1900.

Application filed May 24,1899. Serial No. 718,012. (No model.)

Be it known that l, CHARLES KNOX HARD- ING, of Chicago, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Hydrocarbon- Burners; and l do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form a part of this speciiication.

rlhis invention relates to improvements in lamp-burners of that kindadapted for the combustion of an admixture of gas and vapor and air andwhich is used in connection with an incandescing reticulated tube ofrefractory material, which is heated by the nonilluminating flame of theburner and constitutes the source ot' light.

The invention consists in the matters hereinafter set forth, and moreparticularly pointed out in the appended claims.

As shown in the drawings, Figurel is a longitudinal vertical section ofa lamp-burner embodying my invention. Fig. 2 is an enlarged verticalsection of the parts thereof to which my invention is applied, said viewbeing taken in a plane at right angles to the plane of View of Fig. l.Fig. 3 is a vertical section taken on line 3 3 of Fig. 2. Fig. 4 is across-section taken online 4c et of Fig. 2. Fig. 5 is a detail sectiontaken on line 5 5 of Fig. Ll, and Fig. is a cross-section of avapor-tube and removable filling-tube.

As shown in said drawings, A designates a generating-head provided witha superheating-passage A and a central-vertical opening extendingtherethrough and at the top of which the adinixture of vapor and air isburned.

B designates a vaporizing-pipe attached at its upper end to the head Aand in communication with said superheating-passage and connected at itslower end with a supply-pipe C, which leads from a suitable elevatedtank or source of supply for liquid hydrocarbon. Said pipe is providedat its lower end with an arm l), which latter is provided with a passagewhich connects the supply-pipe O with the pipe E designates a pipe whichis connected at its upper end with the discharge end of thesuperheating-passage and is provided at :its lower end with alaterally-extending arm E', in which is formed a j et-nozzle, throughwhich the vapor is delivered to the burner.

The generating-head A is shown as consisting of a solid casting which isrectangular, as seen in plan View, and the superheating-passage Atherein consists of three connected passages a a c, which are formedtherein parallel with three sides of the head by a drillingtool. Theends of said passages opening at the outer part of the head are closedby screwplugs a a a. The eduction end of the superheating-passage is incommunication with an opening with which the pipe B has open connection.The discharge end of said passage is in communication with a similaropening with which the gas or vapor pipe E is connected.

F designates a tube which surrounds the pipes B and E and the lower partof the generating-head and forms the mixing-chamber of the burner, saidtube fitting in an annular rabbet a2 in said head. The lower end of saidtube is open to admit air to the burner. The head A is provided with acentral opening A4, which, together with the space surrounded by saidtube, constitutes the mixingchamber of the burner, into the lower end ofwhich the vapor from the pipe E is discharged and in which the admixture of vapor and air is formed.

The head A is provided at its top with a tubular upward extension G,which forms the upper part of the central ,recess or passage of thehead. The upper end of said tubular extension G is provided with aforalninous cap or plate G', through which the mixture oi' vapor and airis discharged and at the upper side of which the combustion takes place.Said foraminous plate is provided centrally with a depending conoidalspreader G2, which causes the admixture of air and vapor to bedischarged from the burner-ring in a relatively thin annular jet. Themargin of said plate overlaps the upper end of the burnerring and iitsinto the annular rabbet therein. Over the burner is located anincandescent tubular mantle I, of refractory materiahwhich in theoperation of the burner is maintained IOO in a state of incandescence bythe heat of the iiame which impinges thereon.

A regulating-valve by which the llame may be controlled is locatedbetween the supplypipe and the vaporizing-pipe B, whereby the supply ofliquid hydrocarbon to such pipe may be varied as the needs of the burnerrequire. As herein shown, said valve is located in the passage formed inthe arm D at the lower end of the pipe B, and consists of a conicalvalve-plug formed on the end of a valve-stem D2, which engages a conicalvalveseat d at the end of the passage in said arm D adjacent to the pipeB. Said valve-stem has screw-threaded engagement with the arm D, andsaid arm is provided with a stuffingbox d2 to prevent the escape ofliquid past the same. Said stem is provided on its outer end with a diskd3, by which the stem may be conveniently rotated. As herein shown, thehead A, pipe B, and arm D thereon are made integral or from a singlecasting. The passages in the arm D and the pipe B are made by the use ofa suitable boring-tool, and said passage in the pipe B at the lower endthereofl is closed by a screw-threaded plug b. The supply-valve islocated within the lower ends vof the tube F, which latter isimperforate throughout its length.

Within the vaporizing-pipe B is a capillary mass or filling B' ofabsorbent or fibrous material. Said iilling prevents the direct flow ofthe liquid through the vaporizing-pipe, the material used therefor beingsuch that the liquid passes therethrough by capillary action. Provisionis made for removing and renewing the capillary material, the same beingherein shown as inclosed in a tube B2, which may be removed from thepipe B by unscrewing the plug b at the lower end of said pipe. Said tubeB2 will preferably be split throughout its length and made of a metalpossessing some resiliency, so that its parts may exert outward pressureagainst the walls of the pipe and will act to hold it in place, Whileenabling it to be readily removed from and inserted into the pipe.

The jet-nozzle at the lower end of the pipeV E and from which the vaporis discharged into the mixing-chamber is made as follows: The armE isprovided near its outer end with an upwardly-opening recess E2, Fig. 3,which is in communication with the interior of the pipe E through apassage c. \Vithin said recess is contained a thimble E3, which, asshown, has screw-threaded engagement with the wall of the recess and isprovided at its outer end with a head E4. Said head overlaps the uppersurface of said arm and affords a gas-tight joint between the same andis shaped for engagement thereof with a wrench, by which it is turnedinto and out of place. Said thimble is reduced near its upper end toprovide an annular space around the same, into which the passage eopens, and said space is connected with the interior of of the thimble.

the thimble through a series of circumferential ports or passages c inthe wall of said thimble. A contracted jet-opening e2 in the upper endof said thimble affords a dischargeopening for the vapor from theinterior of the thimble. E5 designates a plug located centrally withinsaid thimble and provided with an upper conical end which fits withinthe contracted upper end of the interior of the thimble. Said stud isreduced at its upper end opposite the ports or passages e to provide anannular space or chamber e3, which is in communication with thejet-opening c2 An annular wick m surrounds the pipe and is adapted to besubmerged at its lower end in the fluid in the cup. Said stud is shownas having screwthreaded engagement at its lower end with the thimble andas inserted thereinto and properly adjusted before the thimbleis placedwithin the recess E2. The vapor which passes from the interior of thethimble outwardly through the jet-opening e2 therein impinges upon theconical upper end of the stud on all sides thereof and issues from saidjet-opening into the mixing-chamber in a conical jet or current whichdiverges in every direction and becomes intermingled with theupwardlyrising air-current which enters the mixingchamber at the lowerend of the tube F. The construction of the jet-nozzle is not intended tocontrol the quantity of vapor which passes therethrough, as such controlis effected solely by the valve D before described. The plug E5 willtherefore be adjusted to the thimble in a manner to effect the requiredspreading of the vapor-jet and consequent intermixture of the vapor andair, and said plug will not be disturbed thereafter unless it be desiredto spread the jet more or less to alter the proportion of such mixtureor for other purpose.

An annular wall or ring ll surrounds the upper part or tubular extensionGr of the generating-head, said rin g, as herein shown, havingscrew-threaded connection with the head A at the base of the tubularextension H. Said ring Il is of greater internal diameter than theexternal diameter of the extension G, thereby providing between the samean angular passage or chamber G, which opens at its ripper end near thepoint of combustion of the admixture. The internal diameter of said ringis greater than the width of said head in planes perpendicular to thesides thereof, so that said ring engages a head only at the cornersthereof, as shown in Figs. 2 and 3, while it stands laterally outside ofsaid head between said corners, as shown in Fig. This arrangementprovides inlet-openings 7L at the lower margin of said ring, throughwhich air may enter said passage or chamber 7L. The generator-head isfurther provided with a plurality of jet-openings extending from thecentral recess or passage thereof outwardly to the outersurface of thehead, near IOO IIO

the lower or main part thereof, which contains the generating-passages.Said jet-openings serve to convey a part of the admixture passingupwardly through the head outwardly to the outer surface of theextension G, where it is turned. The ring II, arranged as described,extends around or outside of the outer or exit ends of the jet-openingsg, so that combustion of the admixture issuing from said jet-openingstakes place in the annular space inclosed by said ring, and the annulardame thereby produced rises around the dame produced by the admixtureissuing from the top of the central passage. To facilitate thedeflection of the adtnixture outwardly through said j et-openings,thewall of said central passage is provided with a downwardlyfacingshoulder,preferably inwardly inclined or oblique, as shown in Fig. 1,and the said jet-openings terminate at their inner ends at saidshoulder. Obviously in place of the several jet-openings described andshown a continuous or practicallycontinuous annular opening or slot maybe formed in the generating-head, the iiame produced in such case beingan annular one instead of a series of jets, such as will be produced inthe construction illustrated.

The mantle I is supported over the burnerring in the usual manner by anupright arm I', which is attached at its lower end to a clamping deviceconnected with the chimneysupporting ring J. The chimney-supporting ringis sustained from the tube F in the usual manner, said tube, ring, andconnecting part being permanently connected together. K designates achimney supported on said ring, said chimney being kept in place by aframe consisting of an upper ring L, which engages the upper end of thechimney, and standards or parts L', attached to said ring and connectedat their lower ends with the supporting-ring J in the usual manner. Thetube I11 is adapted to fit tightly at its upper end upon a cylindricprojection on the bottom of the head and fits closely the outer side ofthe pipes B and E and the outer end of the stuffing-box d on the arm D,the frictional contact between said tube and part ordinarily beingsufficient to hold said tube in place. The valve-stem B2 may passthrough said tube and hold the same in place.

In order to produce an initial heating of the generating-heads toproduce vaporization of the liquid hydrocarbon and start the burner inoperation, a cup M is provided, which is located below the arm D andwithin which alcohol or the like is to be burned to produce thenecessary heat for such vaporization, said cup being provided with acentrally-arranged tube M, which has screw-threaded engagement with thenipple (l of said arm D, so that the cup may be adjusted vertically withrespect to the bottom of the tube F to give a larger or smallerair-inlet opening at this point.

One important feature of my invention is embraced in the construction bywhich the generating-head is provided with openings or passages leadingfrom the central passage thereof outwardly below the top of the headwhere the admixture of gas and air passing upwardly through said passageis burned, said openings or passages serving to afford an annularauxiliary flame surrounding said central passage and below the top ofthe same. Such annular or auxiliary flame is in Contact with the outersurface of the head, and thereby greatly facilitates the heating of thegenerating-passage of the head by reason of the proximity of the part ofthe head which is heated by said supplemental flame to the lowerlportion of the head which contains said passages. In such burners asheretofore constructed it has been common to extend or prolong theuppertubular part of the head above the point of combustion, so as toaiford a liange which surrounds the flame and receives heat therefrom,the intent being that the heat transmitted to said ange will beconducted therefrom to the lower part of the generating-head whichcontains the generating-passages. Such upwardly-directed tubular part isobjectionable for the reason that it distorts the flame and operates todirect it upwardly and elongates it vertically instead of permitting itto expand laterally against the mantle in a manner necessary for mosteffectively heatingthe same. In my improved construction, as abovedescribed, not only is the projection of the upper end of the burnerabove the point of combustion avoided, so that the flame may be free tospread laterally, and thereby come properly in contact with the mantle,but the heating of the generatinghead is more effectively accomplished,because in such prior construction the tubular TOO prolongation referredto is at a considerable l distance above the passages in thegeneratinghead, and therefore serves Very ineiciently to conduct heatthereto, while in my construction the auxiliary flame, being below thetop of the generator and adjacent to said passages, adords a muchsuperior heating effect. Moreover, this feature of the passages oropenings affording an external supplemental flame is of practical value, whether the external ring shown in the drawings as surrounding thetop of the generator be present or not, for the reason that even if suchring be absent the auxiliary flame at the point referred to serves tobetter heat the generating-head, as above described, and also tends toincrease the heating effect of the dame on the mantle, because suchauxiliary liame induces an upward fiow of air around the main body ofthe dame, thereby tending to promote combustion at the exterior flamewhen it comes in contact with the mantle and where an intense heatismost required. The employment of the external ring referred to,forming an annular passage surrounding the central passagc'of theburner,

is, however, of great advantage, for the reason that said ring beingsubject to the heat ofthe auxiliary flame impingin g thereon and beingin contact at its lower end with the body of the generating-head becomeshighly heated and communicates its heat directly to the lower'part ofthe generating-head in which the generating-passages are located. Said 1ring, moreover, when provided with air-inlet openings at its bottomproduces more complete combustion and increased heating effect of theauxiliary flame, it being obvious that the upwardly-directed jets of theadmixture entering said annular passage serve to induce an inward flowof air at the lower end of said passage, thus securing the same effectsthat are obtained in the well-known Bunsen burner. Thesaid ring, whichconstitutes the outer wall of the annular passage referred to,moreoverserves to confine and direct upwardly the auxiliary flame,directing the same against the lower part of the mantle, the lower partof which fits around said ring. It will of course be understood thatcombustion takes place within the said annular passage adjacent to theouter ends of the jet-openings leading from the central passage and thatthe admixture issuing from said jet-openings will be ignited from themain flame at the time of lighting the burner. It will be furtherunderstood that the auxiliary flame referred to carries with it anexcess of air, which enters the lower part of said annular passage,whichair is heated by contact with the sides of said passage and the flame,and this excess of air serves to greatly promote combustion not only ofthe lower part of the auxiliary flame, which comes in contact with thelower part of the mantle, but also the exterior portion of the mainflame, which comes in contact with the mantle and in which the highestpossible degree of heat is needed. I preferably make the central cone orspreader of such shape as to deflect the main-burner flame outwardlytoward the mantle to` such extent that the auxiliary flame risingthrough said passage will give such general direction to the exteriorpart of the combined flame as will carry the same upwardly along themantle in a manner most effective for heating of the same.

An important feature of the invention is comprised in the constructiondescribed, embracing a generating-head, a vaporizing-pipe leadingthereto,iu which pipe and generatinghead the hydrocarbon is vaporizedand superheated, a controlling-valve located between the supply-pipe andvaporizing-pipe, and an imperforate tubular extension depending from thehead around the vaporizing-pipe and extending below the supplyvalve.With this construction the upper end of the vaporizing-pipe ismaintained at a high temperature,while the lower end thereof ismaintained relatively cool by reason of the passage of the incoming airthereover. The vaporization of the liquid fuel therefore takes placeabove` heated part of the pipe is even, thereby in- Y suringa continuous and uniform vaporization of the fuel and a steady flame. Moreover,the passage of the incoming air over the lower end ofthe vaporizing-pipeand the valve not only maintains said parts suitably cool, but heats theincoming air, so that it forms,with the vapor issuing from thevapor-pipe, a combustible mixture, which is relatively hot, and enablesthe flame to be maintained at a higher temperature than if the air weremixed with the vapor at its normal temperature. Furthermore, by reasonof the construction described the liquid hydrocarbon is never ad mittedto the superheating-passages of the burner, and the accumulation ofiresiduary matter in said passages or at the exit-opening of thevapor-pipe is avoided, it being obvious that in cases where thecontrollingvalve is located at the vapor-exit opening the liquidnecessarily fills the generating-passage before the burner is started,and the vaporization of the liquid in such passage will nec essarilyleave a deposit on the walls of the passage, which deposit will not onlyin time close the passage and prevent the free flow of vaportherethrough, but will greatly diminish the generating capacity of theburner, because the coating thereby formed on the walls of the passageserves to prevent the direct and rapid transmission of the heat from themetal to the gas or vapor therein. Furthermore, by reason of theconstruction described accumulation of residuary matter at theexit-opening of the vapor-pipe is prevented, so that the usual meansheretofore provided for keeping clear the exit for the vapor in burnersas commonly made may be omitted.

A special advantage is gained by the use of the cup for containingliquid fuel to start the burner in operation, which will appear from thefollowing: It Will be apparent that the said cup being located beneaththe Vaporizing-tube and the vapor-discharge tube and also beneath thehorizontal arm through which the liquid reaches the vaporizing-tube andthe valve therein located, when the liquid in said cup is ignited theflames will arise around said vaporizing-tube and serve first to heatthe lower portion of said tube, which is first reached by the liquidthat is admitted from the supply-pipe. This construction insures aprompt and rapid heating of such oil, or, in other words, it insures thepreliminary IIO heating of the part of the generating-passage wherevaporization should first take place namely, the part herein called theVaporizing-tube or that containing the filling of capillary material inwhich vaporization takes place in the usual operation of the burner. Bythis construction,therefore, the possibility of the generating-passagebeing filled with oil when starting the burner is obviated, inasmuch asthe yaporizing-tube is heated so hot as to prevent any of the liquidflowing through or past the same and reaching the superheated passage inthe generating-head. Moreover, the location of the cup below thedepending tube, which forms the lower part of the mixing-chamber,insures an inflow of air around the margin of the cup, which carries theflame from the burning liquid in the cup upwardly through the center ofthe burner, so that not onlyis the vaporiZing-tube heated, but the heatof the flame is communicated to the inside surface of the centralpassage in the generating-head, thereby tending to heat rapidly andquickly the entire generatinghead and also the depending vapor-tube andjet-nozzle, with the effect of quickly heating the entire burner andplacing it in condition for continuous operation with the expenditure ofa relatively-small quantity of liquid fuel. An important advantage isgained by the employment of the annular wick in the said cup, for thereason that such wick produces a better ilame and concentrates the flamein a central part of the cup, where it is most elfective for producing aflame of the proper shape to heat the several parts of thegenerating-head.

l claim as my inventionl. The combination of a head provided in itslower part with passages in which the fuel is vaporized and superheatedand having a central passage for the admixture of the vapor and air atthe top of which said adminture is burned, and a mantle tted over theupper end of said head, said head having below its upper end andadjacent to said passages radial openings arranged symmetrically aroundsaid passage which receive a part of the admixture to afford anauxiliary flame around the upper end of the central passage, whichauxiliary flame combines with the iiame of the said central passage,

2. A burner comprising a generating-head provided with a central passagefor the adniixture of vapor and air which is burned at the top of saidpassage, an exterior annular passage surrounding the upper part of saidcentral passage, openings or passages permitting the passage of part ofthe adniixture from said central passage to the external passage,wherein combustion of the admixture passing through said openings orpassages takes place, and a mantle fitted over said head and inclosingthe central and auxiliary passages.

8. A burner comprising a generating-head provided with a central passagefor the admixture of vapor and air, a perforated screen at the top ofsaid passage, an exterior annular passage surrounding the upper part ofsaid central passage, and radial openings through which a part of saidadmixture passes from the said central passage to the said annularpassage in which combustion of the portion of the admixture passingthrough said openings takes place, and a mantle iitted over said headand inclosing the central and auxiliary passages.

4. A burner comprising a generating-head provided with a central passagefor the admixture of vapor and air which is burned at the top of saidpassage, and an exterior annular passage surrounding the upper part ofsaid central passage and connecting with the central passage by openingsthrough which a portion of the admixture passes and is burned in saidannular passage, that portion of the head exterior to said annularpassage being in contact with that part of the generatinghead below saidannular passage in order to transmit heat thereto, and a mantle fittedover said head and inclosing the central and auxiliary passages.

5. A burner comprising a generating-head provided in its lower part withpassages in which the fuel is Vaporized and superheated and having acentral passage for the admixture of vapor and air at the top of whichsuch admixture is burned, said burner having at its upper part anannular passage surrounding said central passage, which annular passageis connected by radial passages in the head with said central passagefor 'supplying a portion of the admixture to the said annular passage,in which the same is burned, that portion of the head outside of saidannular passage being in contact with that portion of the head whichcontains said Vaporizing and superheating passages in order to transmitheat to the same, and a mantle titted over said head and inclosing saidcentral and auxiliary passages.

6. A burner comprising a generating-head, provided at its lower partwith passages in which the fuel is vaporized and superheated and havinga central passage for the admixture of vapor and air at the top of whichsaid admixture is burned, and provided with an annular passagesurrounding the upper part of said central passage and extending to thetop of said central passage, said head being also provided with openingsadjacent to the lower part of the head supplying a portion of theadmixture to the said external passage in the lower part of which thesame is burned, and a mantle fitted over said head and inclosing saidcentral and auxiliary passages.

'7. A burner comprising a generating-head provided at its lower partwith passages in which the fuel is vaporized and superheated and havinga central passage at the top of which the admixture is burned and in itsupper part an annular passage surrounding said central passage, saidannular passage being connected by radial openings in the head IOO IIO

with the central passage and having at its lower end air-inlet openings,and a mantle iitted over said head and inclosing said cen- 'tral andauxiliary passages.

8. A burner comprising a generating-head having a central passage forthe admixture of gas and air, an external ring surrounding the upperpart of the burner-head and forming an annular passage around saidcentral passage, the head being provided with radial openings leadingfrom said central passage to the said annular passage and said ringbeing in contact with the lower part of the generating-head to conductheat thereto.

0. A burner comprising a head having a central passage for the admixtureof vapor and air at the top of which said admixture is burned, said headcontaining a superheatingpassage and being provided with a dependingtubular extension which forms the lower part of the mixing-chamber andwhich is irnperforate from its upper to its'lower end, a verticalvaporizing-tube depending from saidhead and connected with one end ofthe y.. located at the side of said tubular extension and provided atits lower end with a horizontal arm which extends radially toward thecentral axis of said tubularextension and is provided centrally of theburner with a depending nippleadapted for connection with aIittings-pipe, and a controlling-valve located in said arm, saiddepending tube extending below said arm whereby the arm, nipple andvalve are subjected to the inliuence of the incoming air which entersthe lower end of said tubular extension.

10. Aburnercoin-prisingagenerating-head, an upright vaporizing-pipeattached at its upper end to the generating-head, a vaporpipe dependingfrom the head and having at its lower end a discharge-nozzle, a tubeattached to the head and depending around the said vaporizing-pipe andvapor-pipe, and au initial heating-cup for liquid fuel located below thesaid tube and adjustable vertically with respect to the said tube.

11. Aburner comprisingagenerating-head, an upright vaporizing-pipeattached at its upper end to the generating-head, the vaporpipedepending from said head, and having at its lower end a discharge-nozzlewhich is located centrally of the burner, a tube attached to the headand depending around said vaporizing and vapor pipes, a valve at thelower end of the vaporizing-pipe located within the depending tube, andan initial heating-cup located below this tubeand adjustable verticallywith respect to the tube.

12. A burner comprising a generating-head, an upright vaporizing-pipeconnected at its upper end with the head and having at its lower end alateral arm provided with a depending nipple in the central axis of theburner, a controlling-valve in said arm, a vapor-pipe depending from thehead and provided with a lateral arm having a dischargenozzle in thecentral axis of the burner and located above the lateral arm of thevaporizing-pipe, a depending imperforate tube attached tothe head andysurrounding said vapor-pipe and valve, and a cup of equal or greaterdiameter than the tube attached to the said nipple and arrangedconcentrically with respect to said tube.

13. A burner comprising ahead having a depending vapor-discharge pipeterminating at its lower end in a laterally-directed arm, said arm beingprovided with a socket open at one end only, and in communication withsaid pipe, a thimble having screw-threaded engagement with said socketand provided at its upper end with a contracted exit-opening and havinglateral openings connecting its interior with said socket and a pluglocated in said thimble having a tapered upper end the apex of which islocated adjacent to the contracted exit-opening of the thimble, saidplug being removable with the thimble from the socket.

14. The combination of a head having a central passage for the admixtureof vapor and air, an external ring surrounding the upper part of saidburner-head and forming an annular passage around said central passage,and an incandescent mantle iitted over said ring, said head beingprovided with a series of radial openings arranged symmetricallytherearound which lead from the central passage to the lower part of theannular passage, and said ring being in contact with the lower part ofthe head to conduct the heat thereto.

15. A burner comprising a generating-head, an upright vaporizing-pipeconnected atits upper end to the generating-head, a vaporpipe dependingfrom said head and having at its lower end a discharge-nozzle located inthe central axis of the burner, a horizontal arm on the lower end ot thevaporizing-pipe which extends radially past the central axis of theburner, a nipple depending from said arm and adapted for attachment to afittingspipe, a controlling-valve in said horizontal arm which extendslaterally from the burner ICO IIO

on the side opposite to said vaporizing-pipe,

vzoutal arm which extends laterally from the burner on the side oppositeto the said vap my invention ax my signature, in presorizng-pipe, a plugclosing the lower end ence of two Witnesses, this 20th day of May, 1o ofsaid Vaporzug-pipe, and a, tube which de- A. D. 1899.

pends from said 0'eneratin mhead around said T Y T s 5 Vaporizing andtwztpor pip, said tube being CHARLES KNOX HARDE CT imperforated andextending below said oon- Witnesses: trolling-valve. C. CLARENCE POOLE,In testimony that I claim the foregoing as VILLIAM L. HALL.

